近年来，随着技术和工艺的进步，难以利用的尾矿正被重新开发，通过技术创新将尾矿转化为新型材料，成为增储上产的新资源，实现资源高效开发与生态保护双赢。

NOUAKCHOTT, July 22 (Xinhua) -- Mauritanian President Mohamed Ould Cheikh El Ghazouani said he takes profound pride in the strong and enduring friendship between Mauritania and China and looks forward ...

At the third China International Supply Chain Expo (CISCE) in Beijing, South African Agriculture Minister John Steenhuisen shared his vision for agricultural cooperation within the G20 framework durin ...